xen: Rename xen_be_send_notify

Prepare xen_be_send_notify to be shared with frontends:
 * xen_be_send_notify -> xen_pv_send_notify

Signed-off-by: Emil Condrea <emilcondrea@gmail.com>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Quan Xu <xuquan8@huawei.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
diff --git a/hw/net/xen_nic.c b/hw/net/xen_nic.c
index c996684..20c43a6 100644
--- a/hw/net/xen_nic.c
+++ b/hw/net/xen_nic.c
@@ -69,7 +69,7 @@
     netdev->tx_ring.rsp_prod_pvt = ++i;
     RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&netdev->tx_ring, notify);
     if (notify) {
-        xen_be_send_notify(&netdev->xendev);
+        xen_pv_send_notify(&netdev->xendev);
     }
 
     if (i == netdev->tx_ring.req_cons) {
@@ -221,7 +221,7 @@
     netdev->rx_ring.rsp_prod_pvt = ++i;
     RING_PUSH_RESPONSES_AND_CHECK_NOTIFY(&netdev->rx_ring, notify);
     if (notify) {
-        xen_be_send_notify(&netdev->xendev);
+        xen_pv_send_notify(&netdev->xendev);
     }
 }